jvb: fix missing dot in env (jitsi#1521)

Author: aaronkvanmeerten

jvb/rootfs/defaults/jvb.conf

@@ -1,7 +1,7 @@
 {{ $COLIBRI_REST_ENABLED := .Env.COLIBRI_REST_ENABLED | default "false" | toBool -}}
 {{ $ENABLE_COLIBRI_WEBSOCKET := .Env.ENABLE_COLIBRI_WEBSOCKET | default "1" | toBool -}}
 {{ $ENABLE_OCTO := .Env.ENABLE_OCTO | default "0" | toBool -}}
-{{ $ENABLE_JVB_XMPP_SERVER := Env.ENABLE_JVB_XMPP_SERVER | default "0" | toBool }}
+{{ $ENABLE_JVB_XMPP_SERVER := .Env.ENABLE_JVB_XMPP_SERVER | default "0" | toBool }}
 {{ $JVB_DISABLE_STUN := .Env.JVB_DISABLE_STUN | default "0" | toBool -}}
 {{ $JVB_STUN_SERVERS := .Env.JVB_STUN_SERVERS | default "meet-jit-si-turnrelay.jitsi.net:443" -}}
 {{ $JVB_AUTH_USER := .Env.JVB_AUTH_USER | default "jvb" -}}